Elvis and Lisa Marie Presley: "I Love You Because"

The soundtrack to a video commemorating the 35th anniversary of Elvis' death, this is essentially a reissue of the sweetly sentimental country ballad from his self-titled 1956 debut – until just past the halfway point, when his daughter's harmonies float in. Lisa Marie starts out tentative, almost sheepish. But the emotional communion of it settles in, and just like Natalie and Nat King Cole's "Unforgettable," it becomes a legit tear-jerker.